635975 has 6 divisors (see below), whose sum is σ = 788640. Its totient is φ = 508760.

The previous prime is 635969. The next prime is 635977. The reversal of 635975 is 579536.

635975 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 635975 - 2⁴ = 635959 is a prime.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (635977) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12695 + ... + 12744.

It is an arithmetic number, because the mean of its divisors is an integer number (131440).

2⁶³⁵⁹⁷⁵ is an apocalyptic number.

635975 is a deficient number, since it is larger than the sum of its proper divisors (152665).

635975 is a wasteful number, since it uses less digits than its factorization.

635975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25449 (or 25444 counting only the distinct ones).

The product of its digits is 28350, while the sum is 35.

The square root of 635975 is about 797.4804072828. The cubic root of 635975 is about 85.9963492231.

The spelling of 635975 in words is "six hundred thirty-five thousand, nine hundred seventy-five".